I'm glad you are alright, how are the people in the car?
If you rebuild the 560 please consider adding some hazard flashers like is on newer equipment. Drivers need to actually see farm equipment, then need time to recognize there is a hazard there before they can react and only then start to slow down. When you are traveling 45 MPH slower than the traffic there isn't much time for that to happen. Drivers need to see and recognize hazard lights from at least 1/4 mile away to be able to slow down in time. A dim single red tail light pointed low at the ground and a 5 year old faded SMV sign can't grab anyone's attention until they are right on top of it, then it's too late to slow down.
Sorry for the lecture. Motorcycles, pedestians, road construction workers, bicycles, farm equipment, law enforcement and utility crews all have the same problem, drivers can't slow down if they can't see you.